PROPERTY, PLANT AND EQUIPMENT - Maturities of Lease Liabilities (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Leases
2020	$ 34.0
2021	30.5
2022	24.0
2023	19.7
2024	14.3
Thereafter	46.8
Total undiscounted cash flows	169.3
Short-term lease liability	14.0
Long-term lease liability	92.8
Total lease liability	106.8
Difference between undiscounted cash flows and discounted cash flows	62.5
Finance Leases
2020	0.7
2021	0.5
2022	0.3
2023	0.0
2024	0.0
Thereafter	0.0
Total undiscounted cash flows	1.5
Short-term lease liability	0.5
Long-term lease liability	0.5
Total lease liability	1.0
Difference between undiscounted cash flows and discounted cash flows	$ 0.5